Expert Advisor Programming by Andrew R. Young

EXPERT ADVISOR PROGRAMMING
• OrderProfit() – Returns the profit (in the deposit currency) for the selected order.
We'll need to use OrderSelect() before closing or modifying an order. Let's illustrate how we use
OrderSelect() to close an order.
Closing Orders
When we close a market order, we are exiting the trade at the current market price. For buy orders,
we close at the Bid price, and for sell orders, we close at the Ask. For pending orders, we simply
delete the order from the trade pool.
OrderClose()
We close market orders using the OrderClose() function. Here is the syntax:
bool OrderClose(int Ticket, double Lots, double Price, int Slippage, color Arrow);
• Ticket – The ticket number of the market order to close.
• Lots – The number of lots to close. Most brokers allow partial closes.
• Price – The preferred price at which to close the trade. For buy orders, this will be the
current Bid price, and for sell orders, the current Ask price.
• Slippage – The allowed slippage from the closing price, in pips.
• Color – A color constant for the closing arrow. If no color is indicated, no arrow will be
drawn.
You can close part of a trade by specifying a partial lot size. For example, if you have a trade open
with a lot size of 2.00, and you want to close half of the trade, then specify 1 lot for the Lots
argument. Note that not all brokers support partial closes.
It is recommended that if you need to close a position in several parts, you should place multiple
orders instead of doing partial closes. Using the example above, you would place two orders of 1.00
lot each, then simply close one of the orders when you want to close out half of the position. In this
book, we will always be closing out the full order.
The following example closes a buy market order:
OrderSelect(CloseTicket,SELECT_BY_TICKET);
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